Assume that carol rogers (a local millionaire) pledges to donate $500,000 to the springfield humane society, which the society plans to use to build a new animal hospital. based on carol’s promise, the society begins work on the hospital. carol, however, reneges on her offer. in this case:
a. carol may be sued for the money based on promissory estoppel.
b. carol has clearly violated a firm contract.
c. nothing can be done. carol's donation was a gift.
d. carol will suffer from a bad conscience, but not from any lawsuit.

Exercise 2-12 cost behavior; high-low method [lo2-3, lo2-4] speedy parcel service operates a fleet of delivery trucks in a large metropolitan area. a careful study by the company’s cost analyst has determined that if a truck is driven 120,000 miles during a year, the average operating cost is 11.6 cents per mile. if a truck is driven only 80,000 miles during a year, the average operating cost increases to 13.6 cents per mile. required: 1.& 2. using the high-low method, estimate the variable and fixed cost elements of the annual cost of truck operation. (round the "variable cost per mile" to 3 decimal places.)